A crankshaft inspection device and a crankshaft machining method

Abstract

This invention relates to a crankshaft detection device, comprising a frame, a cylinder, a first trigger, a second trigger, a compression spring, a movable bracket, a first sensor, a second sensor, a third sensor, and a detection component. The cylinder is fixedly connected to the frame. A guide cylinder is mounted on the movable bracket. The first and second triggers are both fixedly connected to the piston rod of the cylinder. The compression spring and the guide cylinder are both fitted onto the piston rod of the cylinder. The guide cylinder is supported on the second trigger, and the compression spring is compressibly supported between the first trigger and the guide cylinder. The first and second sensors are both fixedly mounted on the frame. The third sensor is fixedly mounted on the movable bracket. When the movable bracket is supported on the second trigger, the second trigger triggers the third sensor. The detection component is fixedly connected to the lower side of the movable bracket. This invention also proposes a crankshaft machining method. This invention can detect crankshafts whose journals have not been rough-machined before grinding.

Description

Technical Field

[0001] This invention relates to crankshafts, and more specifically to a crankshaft testing device and a crankshaft processing method. Background Technology

[0002] If the crankshaft to be processed is directly put into the grinding machine without rough machining of the journals, the following technical problems will occur: During the grinding process, the grinding wheel will impact the crankshaft, easily leading to the scrapping of the crankshaft and damage to the grinding wheel. In severe cases, it may even lead to the scrapping of the grinding wheel and damage to expensive equipment, requiring a lot of personnel and time to troubleshoot the problem, replace and adjust the damaged parts. The loss of equipment precision will also cause batch problems in subsequent processing, resulting in huge economic losses. Summary of the Invention

[0003] The purpose of this invention is to provide a crankshaft detection device and a crankshaft machining method that can detect crankshafts whose journals have not been rough-machined before grinding.

[0004] The present invention discloses a crankshaft detection device, comprising a frame, a cylinder, a first trigger, a second trigger, a compression spring, a movable bracket, a first sensor, a second sensor, a third sensor, and a detection component. The cylinder is fixedly connected to the frame, with its piston rod facing downwards. A guide cylinder is mounted on the movable bracket. The first trigger, the compression spring, the guide cylinder, and the second trigger are arranged sequentially from top to bottom. Both the first and second triggers are fixedly connected to the piston rod of the cylinder. The compression spring and the guide cylinder are both fitted onto the piston rod of the cylinder. The guide cylinder is supported on the second trigger, and the compression spring is compressibly supported between the first trigger and the guide cylinder. The first and second sensors are both fixedly mounted on the frame. When the first trigger is at the top dead center of its stroke, it triggers the first sensor; when the first trigger is at the bottom dead center of its stroke, it triggers the second sensor. The third sensor is fixedly mounted on the movable bracket. When the movable bracket is supported on the second trigger, the second trigger triggers the third sensor. When the movable bracket moves upward a preset distance relative to the piston rod of the cylinder, the second trigger leaves the triggering range of the third sensor. The detection component is fixedly connected to the lower side of the movable bracket. The detection component has a downward-facing detection slot for detecting the journal of the crankshaft to be processed.

[0005] Optionally, a guide rail extending vertically is fixedly connected to the frame, and the movable support is connected to the guide rail, which restricts the movable support to move only in the vertical direction.

[0006] Optionally, a plurality of detection components are fixedly connected to the lower side of the movable bracket. Each of the plurality of detection components is provided with a detection slot with the slot facing downward. The plurality of detection slots are respectively used to detect a plurality of journals of the crankshaft to be processed.

[0007] Optionally, the detection component is detachably fixed to the movable bracket.

[0008] Optionally, the detection slot is a U-shaped slot.

[0009] Optionally, the first sensor, the second sensor, and the third sensor are all proximity position sensors.

[0010] Optionally, it also includes a tray for supporting the crankshaft to be processed and a conveyor line for conveying the tray and the crankshaft to be processed supported on the tray, with the detection component suspended above the conveyor line.

[0011] Optionally, the conveyor line is provided with a material blocking component capable of blocking and releasing the pallet.

[0012] Optionally, an infrared identification device is provided next to the conveyor line for detecting whether there is a crankshaft to be processed on the tray that is blocked by the material blocking assembly.

[0013] The present invention also proposes a crankshaft machining method, wherein the crankshaft to be machined is inspected by any of the above-mentioned crankshaft inspection devices before entering the grinding process.

[0014] This invention can detect crankshafts whose journals have not been rough-machined before grinding, and features high automation, simple and reliable structure, easy layout and easy adjustment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the crankshaft testing device described in the specific embodiment;

[0016] Figure 2 This is a front view of the crankshaft testing device described in the specific embodiment;

[0017] Figure 3 for Figure 2 AA section view in the middle;

[0018] Figure 4 This is one of the working schematic diagrams of the crankshaft testing device described in the specific implementation embodiment;

[0019] Figure 5 for Figure 4 BB section view in the middle;

[0020] Figure 6 This is the second schematic diagram of the crankshaft testing device described in the specific implementation method;

[0021] Figure 7 for Figure 6 CC section view in the image.

[0022] Among them, 1-fixed bracket; 2-support plate; 3-cylinder; 4-first trigger; 5-compression spring; 6-moving bracket; 7-second trigger; 8-guide cylinder; 9-guide rail; 10-first sensor; 11-second sensor; 12-third sensor; 13-detection component; 14-connecting plate; 15-base plate; 16-piston rod; 17-detection slot; 18-conveyor line; 19-tray; 20-infrared recognition device; 21-stopping assembly; 22-crankshaft to be processed. Detailed Implementation

[0023] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] like Figures 1 to 7A crankshaft detection device is shown, comprising a frame, a cylinder 3, a first trigger 4, a second trigger 7, a compression spring 5, a moving bracket 6, a first sensor 10, a second sensor 11, a third sensor 12, and a detection component 13. The cylinder body of the cylinder 3 is fixedly connected to the frame, and the piston rod 16 of the cylinder 3 is arranged downwards. A guide cylinder 8 is fixedly mounted on the moving bracket 6. The first trigger 4, the compression spring 5, the guide cylinder 8, and the second trigger 7 are arranged sequentially from top to bottom. Both the first trigger 4 and the second trigger 7 are fixedly connected to the piston rod 16 of the cylinder 3. The compression spring 5 and the guide cylinder 8 are both fitted onto the piston rod 16 of the cylinder 3. The guide cylinder 8 is supported on the second trigger 7, and the compression spring 5 is compressibly supported between the first trigger 4 and the guide cylinder 8. The first sensor 10 and the second sensor 11 are both fixedly mounted on the frame. The first sensor 10 is located at the top dead center of the stroke of the first trigger 4, and the second sensor 11 is located at... The first trigger 4 is positioned at the bottom dead center of the stroke of the second trigger 7. When the first trigger 4 is at the top dead center of the stroke, the first trigger 4 triggers the first sensor 10. When the first trigger 4 is at the bottom dead center of the stroke, the first trigger 4 triggers the second sensor 11. The third sensor 12 is fixedly mounted on the movable bracket 6. When the movable bracket 6 is supported on the second trigger 7, the second trigger 7 triggers the third sensor 12. When the movable bracket 6 moves upward a preset distance relative to the piston rod 16 of the cylinder 3, the second trigger 7 leaves the triggering range of the third sensor 12. The detection component 13 is fixedly connected to the lower side of the movable bracket 6. The detection component 13 is provided with a detection slot 17 with the slot facing downward. The detection slot 17 is used to detect whether the journal of the crankshaft 22 to be processed has undergone preliminary processing. In specific implementation, the detection slot 17 is used to detect whether the size of the journal of the crankshaft 22 to be processed is smaller than a preset value to determine whether the journal of the crankshaft 22 to be processed has undergone preliminary processing. By adopting the above technical solution, the cylinder 3 can drive the moving bracket 6 to move up and down, and the signals of the first sensor 10, the second sensor 11 and the third sensor 12 can be used to determine whether the journal of the crankshaft 22 to be processed has been roughed. By setting the crankshaft detection device upstream of the grinding station, the crankshaft 22 to be processed with unrough-machined journals can be detected before grinding. It has the characteristics of high automation, simple and reliable structure and easy layout.

[0026] In some embodiments, a guide rail 9 extending vertically is fixedly connected to the frame, and the movable support 6 is connected to the guide rail 9. The guide rail 9 restricts the movable support 6 to move only in the vertical direction. By adopting the above technical solution, the guide rail 9 can ensure the stability of the vertical movement of the movable support 6.

[0027] As a specific example, cylinder 3 and guide rail 9 are fixedly connected to the frame by bolts. First trigger 4 and second trigger 7 are fixed to piston rod 16 by bolts. Guide cylinder 8 of movable bracket 6 is clearance-fitted with piston rod 16, allowing it to slide on piston rod 16. Compression spring 5 is assembled with a small compression amount, providing downward elastic force to movable bracket 6. When piston rod 16 moves downward, movable bracket 6 moves under its own weight and the elastic force of compression spring 5; when piston rod 16 moves upward, movable bracket 6 moves upward with piston rod 16 under the action of second trigger 7. Detection component 13 completes the retraction / detection action through the up / down movement of movable bracket 6. In specific implementation, when the guide cylinder 8 is supported on the second trigger 7, the compression amount of the compression spring 5 is no more than 20% of the maximum compression amount (i.e., small compression amount assembly), which can provide appropriate elastic force for the moving bracket 6, which is conducive to ensuring the stable movement of the moving bracket 6, and can also ensure that when the detection component 13 is subjected to the resistance of the crankshaft 22 to be processed during the detection process, the moving bracket 6 can move smoothly relative to the piston rod 16.

[0028] As a specific example, the first sensor 10 and the second sensor 11 are bolted to the frame. The first sensor 10 and the second sensor 11 are used to sense the position of the first trigger 4 to determine whether the piston rod 16 has reached its downward / reverse position. The third sensor 12 is bolted to the movable bracket 6. The initial position of the third sensor 12 is directly opposite the second trigger 7. It is used to monitor whether the movable bracket 6 has shifted relative to the piston rod 16, thereby determining whether the state of the crankshaft 22 to be processed is correct. In specific implementation, the preset distance is determined based on the detection range of the second sensor 11.

[0029] In some embodiments, a plurality of detection components 13 are fixedly connected to the lower side of the movable bracket 6. Each of the plurality of detection components 13 is provided with a detection slot 17 with its opening facing downwards. The plurality of detection slots 17 are respectively used to detect a plurality of journals on the crankshaft 22 to be processed. By setting detection components 13 that correspond one-to-one with the plurality of journals on the crankshaft 22 to be processed, it is possible to detect whether there are any journals on the plurality of journals on the crankshaft 22 that have not undergone rough machining in one go, which is beneficial to improving detection efficiency.

[0030] As a specific example, when the crankshaft 22 to be processed is a four-cylinder crankshaft, nine detection components 13 are fixedly connected to the lower side of the moving bracket 6. The nine detection components 13 are used to detect the five main journals and four connecting rod journals of the crankshaft 22 to be processed. Without changing the detection components 13, it can adapt to the detection needs of crankshafts with the same diameter but different crank radii.

[0031] In some embodiments, to facilitate replacement of the detection component 13, the detection component 13 is detachably fixedly connected to the movable bracket 6. As a specific example, multiple detection components 13 are fixedly connected to the base plate 15 by screws to form a detection assembly. The base plate 15 is fixedly connected to the connecting plate portion 14 on the lower side of the movable bracket 6 by bolts. This technical solution offers the advantage of convenient installation and disassembly. When the journal diameter changes or when switching between a three-cylinder and four-cylinder engine, the detection requirements can be met by replacing or disassembling / installing the detection component 13 on the detection assembly; when the crankshaft axial position changes, the entire detection assembly can be replaced for switching.

[0032] In some embodiments, the detection slot 17 is a U-shaped slot. The determination of whether the journal of the crankshaft 22 to be processed has undergone rough machining is made by judging whether the U-shaped slot can be smoothly locked on the journal of the crankshaft 22 to be processed.

[0033] In some embodiments, the first sensor 10, the second sensor 11, and the third sensor 12 are all proximity position sensors.

[0034] In some embodiments, the frame includes a fixed bracket 1 and a support plate 2 fixedly connected to the fixed bracket 1. The guide rail 9, the first sensor 10, and the second sensor 11 are all fixedly connected to the support plate 2, and the cylinder body of the cylinder 3 is fixedly connected to the fixed bracket 1. In specific implementations, the fixed bracket 1 can be formed by fixing multiple profiles together.

[0035] In some embodiments, the crankshaft inspection device further includes a tray 19 for supporting the crankshaft 22 to be processed and a conveyor line 18 for conveying the tray 19 and the crankshaft 22 to be processed supported on the tray 19. The frame is fixedly connected to the conveyor line 18, and the inspection component 13 is suspended above the conveyor line 18. In specific implementations, the conveyor line 18 may be an automatic raceway.

[0036] In some embodiments, a baffle assembly 21 capable of blocking and releasing pallets 19 is provided on the conveyor line 18. The baffle assembly 21 is used to confine the pallets 19 to a preset detection position, which is located below the detection component 13. As a specific example, the baffle assembly 21 includes a baffle element and an actuator, the actuator being connected to the baffle element and used to drive the baffle element to rise and fall; when the actuator drives the baffle element to rise, the baffle element can block the pallets 19 on the conveyor line 18; when the actuator drives the baffle element to fall, it can release the obstruction of the pallets 19 and allow the pallets 19 to pass. In a specific implementation, the actuator can be a drive cylinder fixedly installed on the frame of the conveyor line 18, and the baffle element is connected to the piston rod of the drive cylinder.

[0037] In some embodiments, an infrared identification device 20 is provided alongside the conveyor line 18 for detecting whether there is a crankshaft 22 to be processed on a tray 19 that is blocked by the material blocking assembly 21.

[0038] In some embodiments, the present invention also provides a crankshaft machining method in which the crankshaft 22 to be machined is inspected by any of the above-mentioned crankshaft inspection devices before it enters the grinding process.

[0039] In some embodiments, the crankshaft machining method includes the following steps:

[0040] Step a: As Figures 1 to 3 As shown, the gantry robot grabs the crankshaft 22 to be processed and places it on the pallet 19 on the conveyor line 18. The conveyor line 18 drives the pallet 19 forward to the preset detection position. The pallet 19 is blocked by the material blocking component 21 and stops at the preset detection position.

[0041] Step b: The infrared recognition device 20 detects the crankshaft 22 to be processed on the tray 19 and sends a feedback signal to the production line control system. The production line control system then controls the cylinder 3 to operate. The piston rod 16 moves downward, driving the first trigger 4, compression spring 5, guide cylinder 8, and second trigger 7 to move downward. The moving bracket 6 drives the detection component 13 downward until the first trigger 4 triggers the second sensor 11. The second sensor 11 sends a sensing signal back to the production line control system, which then stops the cylinder 3. The production line control system then determines whether the journal condition of the crankshaft 22 to be processed is correct based on whether the third sensor 12 has a sensing signal. Figure 4 and Figure 5 As shown, if the third sensor 12 is triggered by the second trigger 7 and a sensing signal is received, then the journal condition of the crankshaft 22 to be processed is correct; Figure 6 and Figure 7 As shown, if the third sensor 12 does not receive a signal, the journal condition of the crankshaft 22 to be processed is incorrect.

[0042] Step c: The production line control system controls the cylinder 3 to operate. The piston rod 16 drives the first trigger 4, compression spring 5, guide cylinder 8, and second trigger 7 to retract upwards. The moving bracket 6 drives the detection component 13 to retract. If the crankshaft 22 to be processed is judged to be in the correct state in step b, the production line control system sends a command to the material blocking assembly 21. The material blocking assembly 21 releases the pallet 19, and the conveyor line 18 conveys the pallet 19 to the loading position on the grinding machine. At the same time, the material blocking component of the material blocking assembly 21 rises to block the next pallet 19, and one anti-leakage processing cycle is completed.

[0043] In some embodiments, if the crankshaft 22 to be processed is in the correct state, the production line control system will issue an instruction to the stop assembly 21 to release it, and the conveyor line 18 will convey the pallet 19 to the loading position on the grinding machine; if the crankshaft 22 to be processed is in the wrong state, the production line control system will issue an alarm to remind the worker to remove the crankshaft 22 to be processed in the wrong state.

[0044] In specific testing, such as Figure 4 and Figure 5 As shown, if the crankshaft 22 to be processed is in the correct state, the detection component 13 will not be resisted downwards by the journal of the crankshaft 22 to be processed, the detection slot 17 can be smoothly locked on the journal of the crankshaft 22 to be processed, the moving bracket 6 will not have an upward displacement on the piston rod 16, and the third sensor 12 will always remain in a state of facing the second trigger 7. Figure 6 and Figure 7 As shown, if the journal of the crankshaft 22 to be processed has not undergone rough machining, the detection slot 17 will have difficulty smoothly engaging with the journal of the crankshaft 22. The downward movement of the detection component 13 will be resisted by the journal of the crankshaft 22. This resistance acts on the moving bracket 6 through the detection component 13, preventing the moving bracket 6 from moving downwards. At this time, the first trigger 4 does not trigger the second sensor 11, and the piston rod 16 will continue to move downwards until the first trigger 4 triggers the second sensor 11, causing the piston rod 16 to stop its downward movement. At this point, the second trigger 7 has already moved out of the sensing range of the third sensor 12. Therefore, the state of the crankshaft 22 to be processed can be determined based on whether the third sensor 12 is triggered.

[0045] The crankshaft testing device proposed in this invention can be installed on the conveyor line 18, which has low site requirements. The testing component 13 has strong compatibility, simple and reliable structure, and can be adjusted according to different series of crankshafts to be processed. It is easy to adjust and has high flexibility.

[0046] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. In the description of this specification, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A crankshaft testing device, characterized in that, The system includes a frame, a cylinder, a first trigger, a second trigger, a compression spring, a moving bracket, a first sensor, a second sensor, a third sensor, and a detection component. The cylinder is fixedly connected to the frame, with its piston rod facing downwards. A guide cylinder is mounted on the moving bracket. The first trigger, the compression spring, the guide cylinder, and the second trigger are arranged sequentially from top to bottom. Both the first and second triggers are fixedly connected to the piston rod of the cylinder. The compression spring and the guide cylinder are both fitted onto the piston rod of the cylinder, and the compression spring is compressibly supported between the first trigger and the guide cylinder. The first and second sensors are both fixedly mounted on the frame. When the first trigger is at the top dead center of its stroke, it triggers the first sensor. When the first trigger is at the top dead center of its stroke, it triggers the second sensor. When the crankshaft reaches its bottom dead center, the first trigger triggers the second sensor; the third sensor is fixedly mounted on the movable bracket. When the guide cylinder is supported on the second trigger, the second trigger triggers the third sensor. When the movable bracket moves upward a preset distance relative to the piston rod of the cylinder, the second trigger leaves the triggering range of the third sensor. The detection component is fixedly connected to the lower side of the movable bracket. The detection component is provided with a downward-facing detection slot, which is used to detect the journal of the crankshaft to be processed. When the guide cylinder is supported on the second trigger, the compression amount of the compression spring is not greater than 20% of the maximum compression amount. A guide rail extending in the vertical direction is fixedly connected to the frame. The movable bracket is connected to the guide rail, and the guide rail limits the movable bracket to move only in the vertical direction.

2. The crankshaft testing device according to claim 1, characterized in that, Multiple detection components are fixedly connected to the lower side of the movable bracket. Each of the multiple detection components is provided with a downward-facing detection slot. The multiple detection slots are used to detect multiple journals of the crankshaft to be processed.

3. The crankshaft testing device according to claim 1, characterized in that, The detection component is detachably fixed to the movable bracket.

4. The crankshaft testing device according to claim 1, characterized in that, The detection slot is a U-shaped slot.

5. The crankshaft testing device according to claim 1, characterized in that, The first sensor, the second sensor, and the third sensor are all proximity position sensors.

6. The crankshaft testing device according to claim 1, characterized in that, It also includes a tray for supporting the crankshaft to be processed and a conveyor line for conveying the tray and the crankshaft to be processed supported on the tray, with the detection component suspended above the conveyor line.

7. The crankshaft testing device according to claim 6, characterized in that, The conveyor line is equipped with a material blocking component capable of blocking and releasing the pallet.

8. The crankshaft testing device according to claim 7, characterized in that, An infrared identification device is installed next to the conveyor line to detect whether there is a crankshaft to be processed on the tray that is blocked by the material blocking assembly.

9. A crankshaft machining method, characterized in that, Before the crankshaft to be processed enters the grinding process, the crankshaft to be processed is inspected using the crankshaft inspection device described in any one of claims 1-8.

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